What technical approach is MOST effective in dynamically adapting the layout and user interface of Live.com to accommodate a wide range of device screen sizes and resolutions?

The MOST effective technical approach for dynamically adapting the layout and user interface of Live.com to accommodate a wide range of device screen sizes and resolutions is Responsive Web Design (RWD). Responsive Web Design is a web development approach that creates web pages that adapt to fit the screen size and orientation of the device being used to view them. It achieves this through the use of flexible grids, flexible images, and CSS media queries. Flexible grids ensure that page elements resize proportionally based on the screen size, rather than using fixed pixel widths. Flexible images scale to fit their containing elements, preventing them from overflowing on smaller screens. CSS media queries allow developers to apply different styles based on device characteristics, such as screen width, height, orientation, and resolution. For example, a media query might specify that a navigation menu should be displayed horizontally on larger screens but collapsed into a hamburger menu on smaller screens. By using RWD, Live.com can provide an optimal viewing experience for users on desktops, laptops, tablets, and smartphones, without requiring separate versions of the website for each device.